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JJF 2018-2022 English PDF

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JJF 2018-2022: Calibration Specification for Charge Meters
Status: Valid

Standard ID	Contents [version]	USD	STEP2	[PDF] delivered in	Standard Title (Description)	Status	PDF
JJF 2018-2022	English	459	Add to Cart	4 days [Need to translate]	Calibration Specification for Charge Meters	Valid	JJF 2018-2022

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Basic data

Standard ID	JJF 2018-2022 (JJF2018-2022)
Description (Translated English)	Calibration Specification for Charge Meters
Sector / Industry	Metrology & Measurement Industry Standard
Classification of Chinese Standard	A55
Word Count Estimation	22,285
Date of Issue	2022-12-27
Date of Implementation	2023-06-27
Issuing agency(ies)	State Administration for Market Regulation

JJF 2018-2022: Calibration Specification for Charge Meters

---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
National Metrology Technical Specifications of the People's Republic of China Calibration specification for electric charge measuring instrument Released on 2022-12-27 2023-06-27 Implementation Released by the State Administration for Market Regulation Calibration specification for electric charge measuring instrument Charge Meters Responsible unit. National Electromagnetic Metrology Technical Committee Main drafting unit. Beijing Oriental Institute of Metrology and Testing Participating in the drafting unit. Liaoning Provincial Inspection and Testing Certification Center Guangdong Institute of Metrology Dalian Institute of Metrology, Inspection and Testing Co., Ltd. This specification entrusts the National Electromagnetic Metrology Technical Committee to be responsible for interpretation The main drafters of this specification. Chen Shaohua (Beijing Oriental Institute of Metrology and Testing) Jin Haibin (Beijing Oriental Institute of Metrology and Testing) Ji Haini (Beijing Oriental Institute of Metrology and Testing) Guo Baijun (Liaoning Provincial Inspection and Testing Certification Center) Participating drafters. Liang Guoding (Liaoning Provincial Inspection and Testing Certification Center) Wu Haiyi (Guangdong Institute of Metrology) Zhao Xiaojun (Dalian Institute of Metrology, Inspection and Testing Co., Ltd.)

Introduction (Ⅱ) 1 Scope(1) 2 References(1) 3 Terms and units of measurement(1) 4 Overview(1) 5 Metrological characteristics(1) 6 Calibration conditions(2) 6.1 Environmental conditions (2) 6.2 Measuring standards and other equipment(2) 7 Calibration Items and Calibration Methods(3) 7.1 Calibration items(3) 7.2 Calibration method(3) 8 Calibration result expression(5) 8.1 Calibration certificate(5) 8.2 Data rounding off (6) 9 Recalibration interval(6) Appendix A Example of Calibration Uncertainty Evaluation of Indication Error of Charge Meter (7) Appendix B Calibration Raw Record Format(13) Appendix C Calibration Certificate Inner Page Format (15)

Introduction

This specification is based on JJF 1071-2010 "National Measurement and Calibration Specification Writing Rules", JJF 1059.1-2012 "Evaluation and Expression of Measurement Uncertainty" was compiled. This specification is published for the first time. Calibration specification for electric charge measuring instrument

1 Scope

This specification applies to the calibration of charge measuring instruments with a measurement range of 0.1nC~20μC. This specification does not apply to Calibration of charge meter.

2 References

This specification references the following documents. JJF 1023-1991 Terminology of commonly used electrical measurement terms (Trial) For dated references, only the dated version applies to this specification; for undated references document, its latest version (including all amendments) applies to this specification.

3 Terminology and units of measurement

electric charge The amount of electric charge carried by an object. The amount of charge is sometimes referred to as electricity for short, and its SI unit is coulomb, which corresponds to The number is C.

4 Overview

The charge measuring instrument is an instrument designed to measure the charge of charged objects (such as fabrics, charged conductors, etc.), It can directly read the value of the charge, generally using components such as integrated circuits, high input impedance op amps and electrostatic capacitors, which can Use with a Faraday cage. The measurement objects of the charge measuring instrument can be considered as various charges that can output charge Sources, including static charge sources, charged capacitors, fabrics after friction, etc. According to the input method, the charge measuring instrument can be divided into virtual ground type and non-virtual ground type. The specific principle is shown in Figure 1. (a) Virtual ground type (b) Non-virtual ground type Figure 1 Principle of charge measuring instrument

5 Metrological characteristics

5.1 Measuring range. ±(0.1nC~20μC). 5.2 Maximum allowable error. ±(0.2%~10%).

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